Die press



Aug. 20, 1929. c. T. LYONS ET AL 1,725,287

DIE PRESS Filed 001. 18. 1926 g ntot (Ila/ks T y liar/J W Patented Aug.20, 1929.

UNITED STATES PATENT OFFICE.

CHARLES T. LYONS AND HARRY W. BELL, OF SEATTLE, WASHINGTON, ASSIGNORS TOTHE DURABLE MAT COMPANY, OF SEATTLE, WASHINGTON.

DIE PRESS.

Application filed October 18, 1926. Serial No. 142,187.

The invention is a die press for removing rectangular shaped blocks fromused motor vehicle tires:

The objectof the invention is to provide means for efficiently removingblocks from the walls of motor vehicle tires.

Another object of the invention is to provide means for removingrectangular shaped blocks from the walls of used motor vehicle tires,which minimizes the waste.

And a further object of the invention is to provide a compound die andmeans for operating the same which will efficiently remove rectangularshaped blocks with curved ends, from the walls of motor vehicle tires,and instantly separate the blocks from the waste.

With these ends in view the invention embodies a combination die, pinsco-operating with the said die, cams for operating the said pins, and apress for operating the said die.

Other features and advantages of the invention will appear from thefollowing description taken in connection with the drawings, wherein:

Figure 1 is a view showing a punch press.

Figure 2 is a detail view showing the arrangement of the dies, and pinsand cams for operating the said dies.

Figure 3 is a View showing the face of the dies and one arrangement ofthem.

Figure 4 is a view showing a single die as it may be used.

Figure 5 is a similar view showing a double die.

Figure 6 is a view showing one of the rectangular shaped blocks that maybe stamped from the tire, or the like.

In the desi n shown, the press which is indicated by the numeral 1 isprovided with an eccentric arm 2 which operates a carriage 3, and in thecarriage 3 is a cam shaft 4 that may be operated by a chain 5, which isindicated in dotted lines. This cam shaft is shown more clearly inFigure 2 and the cams which are indicated by the numeral 6 engage heads7 of vertical pins, as shown. The pins are provided with springs 8 whichhold them in the upward position and these pins operate in and betweenthe dies, which are indicated by the numeral 9. The outer shell of thedie is of a rectangular shape with curved ends, as shown in Figure 4 andin this die are tubular members 10 which form the small circular openingas indicated by the numeral 11 adjacent the ends of the block, which isindicated by the numeral 12 and shown in Figure 6. Inside of the tubes10 are pins 13 which are operated by the cams 6 and springs 8, ashereinbefore described, and in the center of the die 9 is a pin 14 witha plate l5 on its lower end, which is also operated by the springs andcams and at the ends of the die are other pins 16 which are alsooperated by the cams and springs. Below the dies and on the table of thepress is a block of lignum-vitae, as indicated by the numeral 17 In thedesign shown the dies are arranged as shown in Figure 3 so that threeblocks may be stamped out with one operation and the dies are arrangedon a slight curve to conform to the curvature of a tire so that themaximum number of blocks may be stamped out of a tire. It is alsounderstood that only one die may be used, as shown in F igured and alsothat they may be arranged in pairs, as shown in Figure 5, or in anyother grouping desired. The dies may also be of any suitable shape, withpointed or square ends, or with the sides corrugated, or shaped in anysuitable manner.

It is understood that other changes may be made without departing fromthe spirit of the invention, one of which changes may be in the use ofother types of dies, another may be in the use of other means forholding and operating the dies, and still another may be in the use ofany other suitable means for removing these blocks from tires.

The construction will be readily understood from the foregoingdescription. In use the dies may be arranged as shown, and a section ofa motor vehicle tire placed upon the block 17 directly below the dies.The carriage 3 may then be tripped so that the dies will be forcedthrough the wall of the tire and immediately the cams will force thepins 16 downward to force the tire away from the exterior of the dies.At the same time the dies will force the pins 13 downward to force thesmall circular members that are cut from the openings 11 out of thetubes 10. As soon as this operation is completed the cams operating thepins 14 will force these pins downward and also the plates 15 and thesewill remove the blocks 12 from the dies. This particular arrangement ofpins and cams provides a very eflicient die which removes the block andinstantly separates it from the Waste. It is understood that the samearrangement of pins and cams may be used with the dies as shown inFigures 4 and 5 or with any suitable arrangement of the dies. It will beobserved that the lower edges of the dies are curved and sharpened sothat they actually out through the material instead of endeavoring topunch the blocks out. 7

Having thus fully described the invention what we claim as new anddesire to secure by Letters Patent, is:

1. A machine for stamping blocks from motor vehicle tires comprising aframe, a hard wood bed plate positioned on the frame, a plurality ofvertically movable dies angularly positioned in relation to each other,in an are having a common radius, a plurality of independently operatedplungers cooperating with the said dies, a plurality of cams arranged ona cam shaft for operating the said plungers independent of each otherand independent of the dies, an eccentric'for operating the said dies,and driving means for operating the said eccentric and cams. Y

2. A machine for stamping blocks from motor vehicle tires comprising aframe, a plurality of vertically movable dies, a plu rality ofindependently operated plungers cooperating with the said dies, aplurality of cams arranged on a cam shaft for operating the saidplungers independent of each other and independent of the dies, aneccentric for operating the said dies, and driving means for operatingthe said eccentric and cams.

3. A machine for stamping blocks from motor vehicle tires comprisingframe, a hard wood bed plate positioned on the frame, a plurality ofvertically movable dies, a pluraiity of independently operated plungerscooperating with the said dies,a plurality of car s arranged on a camshaft for operating the said plungers independent of each other andindependent. of the dies, an eccentric for operating the said dies, anddriving means for operating the saideccentric and cams.

In testimony whereof We afiiX our signa tures.

CHARLES 'T. LYONS. HARRY W. BELL.

